From: Ming Zhang <mingz@ele.uri.edu>
To: Mike Hardy <mhardy@h3c.com>
Cc: PFC <lists@peufeu.com>, "Paul M." <paul@gpmidi.net>,
linux-raid@vger.kernel.org
Subject: Re: how to clone a disk
Date: Sat, 11 Mar 2006 17:09:51 -0500 [thread overview]
Message-ID: <1142114991.27020.9.camel@localhost.localdomain> (raw)
In-Reply-To: <4413011F.30709@h3c.com>
On Sat, 2006-03-11 at 08:55 -0800, Mike Hardy wrote:
> I can think of two things I'd do slightly differently...
>
> Do a smartctl -t long on each disk before you do anything, to verify
> that you don't have single sector errors on other drives
will this test interfere with normal disk io activity?
>
> Use ddrescue for better results copying a failing drive
yes, ddrescue will be better here than dd.
>
> -Mike
>
> PFC wrote:
> >
> >>> I have a raid5 array that contain 4 disk and 1 spare disk. now i saw one
> >>> disk have sign of going fail via smart log.
> >
> >
> > Better safe than sorry... replace the failing disk and resync,
> > that's all.
> >
> > You might want to do "cat /dev/md# > /dev/null", or "cat /dev/hd?
> >
> >> /dev/null" first. This is to be sure there isn't some yet-unseen bad
> >
> > sector on some other drive which would screw your resync.
> > -
> > To unsubscribe from this list: send the line "unsubscribe linux-raid" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2006-03-11 22:09 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-11 0:56 how to clone a disk Ming Zhang
2006-03-11 11:53 ` Paul M.
2006-03-11 12:40 ` PFC
2006-03-11 16:55 ` Mike Hardy
2006-03-11 22:09 ` Ming Zhang [this message]
2006-03-11 23:08 ` Mike Hardy
2006-03-11 23:10 ` Ming Zhang
2006-03-11 22:08 ` Ming Zhang
2006-03-12 0:15 ` dean gaudet
2006-03-12 0:22 ` Ming Zhang
2006-03-12 0:31 ` dean gaudet
2006-03-12 0:36 ` Ming Zhang
2006-03-12 0:47 ` dean gaudet
2006-03-12 0:54 ` Ming Zhang
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